High gain DC-DC boost converter with a coupling inductor

Abstract

This paper presents a design, mathematical modeling, simulation results and laboratory implementation of a 300W high gain dc-dc boost converter with a coupled inductor, to step up the 24V of a battery bank to 311Vdc, aiming to supply residential loads with dc voltage in an off-grid PV system. The converter can supply most of the residential ac loads which input stage is a single-phase rectifier. Laboratory tests with the 300W converter supplying electronic lights, mobile charger and audio-video system ac showed the viability of the proposed idea.

High Step-up Voltage Gain Converter with Ripple-free Input Current for Renewable Energy Sources

“…Also, the measured voltage stress in Fig.14～Fig.16 are consistent with the theoretical analysis. Fig.17 shows efficiency comparison of the proposed zero input current ripple high step-up voltage gain converter and the converter proposed in [12]. It can be seen from Fig.17, the proposed converter in this paper can achieve maximum efficiency of 94.5%, and 94% efficiency at full load.…”

“…It can be seen from Fig.17, the proposed converter in this paper can achieve maximum efficiency of 94.5%, and 94% efficiency at full load. The coupled-inductor-based Boost converter proposed in [12] can achieve maximum efficiency of 93.5%. The power conversion efficiency improvement of the converter proposed in this paper is achieved due to following reasons: 1) by adjusting turns ratio of coupled-inductor, extreme duty cycle operation can be avoided in the converter proposed in this paper, therefore, improve the efficiency of the converter; 2) by utilizing voltage-doubler cell to extend the voltage gain, the voltage stress of switch is further reduced and the resonance between the leakage inductance and the stray capacitor of the output diode is eliminated.…”

“…Consequently, the conversion efficiency is degraded and the electromagnetic interference (EMI) problem is severe under this situation. To achieve a high conversion ratio and to avoid operating at extremely high duty cycles, many nonisolated converter topologies have been studied [1][2][3][4][5][6][8][9][10][11][12][13][14][15][16][17][18]. By using switched capacitor or switched inductor cell, high voltage gain of converter can be achieved [12][13][14].…”

Comparative analysis of high voltage gain DC-DC converter topologies for photovoltaic systems

“…As a solution, active clamp circuits are used in order to reprocess leakage energy to attain soft switching under the zero-voltage (ZVS) [127]. Moreover, additional clamp switch will increase topology complexity [128][129][130].…”

An extensive review of nonisolated DC-DC boost-based converters

“…Resonance may also occur between the leakage inductance inductor L 1 and capacitor C c when the inductor is not fully discharged in continuous current mode (CCM). A modified version of the aforementioned topology is proposed in [28], where a clamping circuit is used to reduce the voltage stress across the main switch due to leakage inductance of the coupled inductor.…”